Double piece retainer for compact valve

ABSTRACT

A compact manifold ball valve having a valve body, valve ball, valve stem and two piece retainer system; the valve body including a valve chamber having first and second ends, and a first flow passage intersecting the valve chamber and valve ball. The valve ball can be trunnion supported and include pair of movable seat assemblies that can be used to seal the valve ball to the valve body. A two piece retainer can be used to hold in place the valve components, the two piece retainer including a first section which moves only linearly along with a second retainer piece that is a threaded ring that rotationally locks in place the first section of the two piece retainer. The two pieces of the retainer can be symmetrically located about the centerline of the flow passage of the valve body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a non-provisional of U.S. Provisional Patent Application Ser. No. 61/946,252, filed Feb. 28, 2014, which is incorporated herein by reference.

Priority of U.S. Provisional Patent Application Ser. No. 61/946,252, filed Feb. 28, 2014, is hereby claimed.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable

REFERENCE TO A “MICROFICHE APPENDIX”

Not applicable

BACKGROUND

Conventionally available are side entry compact valves including a valve ball having integral opposed trunnions rotating in upper and lower trunnion support plates, which plates are supported by the valve body, with right and left valve seats and seals for sealing, and all of which components are inserted and removed from the valve body via one of the side openings of the valve, and which components are held in place during use with a threaded retainer.

The “compact” nature of compact valves generally results from a short or compact valve body having opposed “open” ends each defining a flange closure seat which is engaged by and establishes sealing with a flange closure which may be defined by a flange of a pipe section of the manifold or other piping assembly. Since no other body closure members are provided, the overall length of the valve body is short and compact as compared with the valve body structures of conventional ball valves. Accordingly, the compact manifold ball valves can be installed in piping systems such as flow control manifolds in offshore production platforms where minimal space is available.

One example of a type of side entry compact valve is disclosed in U.S. Pat. No. 6,669,171 for a “Compact Manifold Trunnion Ball Valve” which is incorporated herein by reference. The upper and lower trunnion support plates prevent the valve ball from transferring downstream loads to the seals and seats reducing frictional forces between the ball and seals.

However, in conventionally available side entry compact valves generally a single piece retainer is threadably connected to the valve body, wherein such single piece retainer must be rotated relative to both the valve body and the adjacent valve seat with such relative rotation causing wear to the seals between the valve seat and retainer along with the seals between the retainer and valve body.

It has been found that sealing elements in compact valves have a significant risk of becoming excessively worn and/or damaged during valve assembly and/or disassembly. It has been found that relative rotational movement between the valve components and the seals increase the risk of substantial wear and/or damage to the seals.

It would be advantageous to have a retainer both threadably connected to the valve body and concentrically positioned in said body, wherein there is little no relative rotational movement between sealing elements for the valve seat and retainer.

It would be advantageous to have a retainer both threadably connected to the valve body and concentrically positioned in said body, wherein there is little no relative rotational movement between sealing elements for the valve body and retainer.

SUMMARY

One embodiment generally relates to compact ball valves for use in conduit manifold systems. More particularly one embodiment includes a compact manifold ball valve having a valve body, valve ball, and valve stem; the valve body including a valve chamber having first and second ends, and a first flow passage intersecting the valve chamber and valve ball. The valve ball can be trunnion supported with at least one trunnion support element. A pair of movable seat assemblies can be used to seal the valve ball to the valve body. In one embodiment the above referenced components can be held in place during use with a threaded two piece retainer.

In one embodiment the two piece retainer longitudinally holds in place at least one trunnion support element restricting the amount of longitudinal movement of said trunnion support element. In one embodiment two trunnion support elements are longitudinally held in place with restricted to no longitudinal movement allowed.

In one embodiment is provided a retainer which is both threadably connected to the valve body and concentrically positioned in said body includes a sealing portion having little to no relative rotational movement between sealing elements for the valve seat and retainer section during valve assembly.

In one embodiment is provided a two piece retainer which is both threadably connected to the valve body and concentrically positioned in said body, wherein the two piece retainer includes first and second sections, wherein the first section having little to no relative rotational movement between sealing elements for the valve seat and retainer section during valve assembly.

In one embodiment is provided a two piece retainer which is both threadably connected to the valve body and concentrically positioned in said body, wherein the two piece retainer includes first and second sections, wherein the second section is threadably connected to the valve body such that rotation of the first section relative to the valve body causes either tightening or loosening of the first section relative to the valve body.

In one embodiment is provided a two piece retainer including first and second sections, wherein the second section is a ring, and rotational movement of the second section causes linear movement of the second section.

In one embodiment rotational movement of the first section relative to the valve body is constrained and/or prevented. In one embodiment at least one locking pin rotationally locks the first section relative to the valve body while allowing linear movement of the first section relative to the valve body.

In one embodiment rotational movement of the first section relative to the valve body is constrained and/or prevented while relative linear movement is allowed. In one embodiment the first section includes a detachable sealing element along with at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of both the first section and sealing element relative to the valve body.

In one embodiment the first section includes a first detachable sealing element and the valve seat includes a second detachable sealing element. In this embodiment the first section also includes at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of the first section (and the first sealing element when attached to the first section) relative to the valve body, along with relative movement between the valve seat (and second sealing element when attached to the valve seat) with respect to the first section. In one embodiment the first sealing element forms a seal between the first section and valve body, while the second sealing element forms a seal between the first section and valve seat.

In one embodiment the first section includes first and second detachable and spaced apart sealing elements, along with at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of the first section (and the first and second sealing elements when attached to the first section) relative to the valve body. In one embodiment the first sealing element forms a seal between the first section and valve body, while the second sealing element forms a seal between the first section and valve seat.

In one embodiment the locking pins are have a relatively small shear force where a rotational force exceeding a predefined force will cause the shear pin(s) to shear and allow rotational movement between the first section and valve body.

In one embodiment two locking pins are used which are symmetrically spaced about the first section of the retainer.

In various embodiments at least 50 percent of the longitudinal length of the first retainer section enters the interior portion of the valve body. In various embodiments at least 55, 60, 65, 70, 75, 80, 85, 90, 95, 96, 97, 98, 99, and 100 percent of the first retainer section enters the interior portion of the valve body during assembly. In various embodiments the amount of longitudinal length of the first retainer section entering the valve body during assembly is between about a range of any two of the above referenced percentages.

In various embodiments at least 50 percent of the longitudinal length of the second retainer section enters the interior portion of the valve body. In various embodiments at least 55, 60, 65, 70, 75, 80, 85, 90, 95, 96, 97, 98, 99, and 100 percent of the second retainer section enters the interior portion of the valve body during assembly. In various embodiments the amount of longitudinal length of the second retainer section entering the valve body during assembly is between about a range of any two of the above referenced percentages.

In one embodiment the retainer pins are less than about 3 mm in diameter. In various embodiments the retainer pins are less than about 3, 2.5, 2.0, 1.9, 1.8, 1.7, 1.6, 1.5, 1.4, 1.3, 1.2, 1.1, 1.0, 0.9, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, and 0.1 mm. In various embodiments the diameters of the retainer pines are between about any two of the diameters specified in this paragraph.

In various embodiments the first retainer section includes a plurality of openings and the valve body includes a plurality of openings which match the plurality of openings for the first retainer section. In various embodiments a plurality of retainer pins can be placed in the plurality of openings to rotationally lock the first retainer section with respect to the valve body.

In various embodiments the second retainer section locks in place the plurality of retainer pins in their respective plurality of openings.

While certain novel features of this invention shown and described below are pointed out in the annexed claims, the invention is not intended to be limited to the details specified, since a person of ordinary skill in the relevant art will understand that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation may be made without departing in any way from the spirit of the present invention. No feature of the invention is critical or essential unless it is expressly stated as being “critical” or “essential.”

The drawings constitute a part of this specification and include exemplary embodiments to the invention, which may be embodied in various forms.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

For a further understanding of the nature, objects, and advantages of the present invention, reference should be had to the following detailed description, read in conjunction with the following drawings, wherein like reference numerals denote like elements and wherein:

FIG. 1 is a sectional side view of one embodiment the showing a compact valve body with a two piece retainer holding in position the valve ball and trunnion support elements along with the valve ball seats.

FIG. 2 is an end view of the compact valve shown in FIG. 1, but all valve components shown in an exploded condition from the second end of the body of the compact valve.

FIG. 3 is a sectional view of the compact valve shown in FIG. 4 taken along the lines 3-3.

FIG. 4 is a perspective view of the first retainer section shown in the valve of FIG. 1.

FIG. 5 is an end view of the first retainer section shown in FIG. 4.

FIG. 6 is a sectional view of the first retainer section shown in FIGS. 4 and 5, taken along the lines 6-6.

FIG. 7 is a perspective view of the second retainer section shown in the valve of FIG. 1.

FIG. 8 is an end view of the second retainer section shown in FIG. 7.

FIG. 9 is a sectional view of the second retainer section shown in FIGS. 7 and 8, taken along the lines 9-9.

FIG. 10 is a partially exploded perspective view of the valve of FIG. 1 with the two piece retainer of FIGS. 4 through 9 positioned to be installed in the valve body where the valve ball and seats are already installed in the valve body.

FIG. 11 is a sectional view of the partially exploded view of the embodiment shown in FIG. 10 taken along with lines 11-11.

FIGS. 12 through 15 schematically indicate the assembly steps of placement of the first and second retainer sections into the valve body.

FIG. 12 shows both the first and second retainer sections before placement in the valve body of the compact valve.

FIG. 13 shows the valve of FIG. 12 where the first retainer section has been partially inserted into the valve body, but the second retainer section has not yet been inserted into the valve body.

FIG. 14 shows the valve of FIG. 12 where both the first and second retainer sections have been partially inserted into the valve body.

FIG. 15 shows the valve of FIG. 12 where both the first and second retainer sections have been completely inserted into the valve body.

FIG. 16 is a perspective view of the valve body taken from the first end of the valve body.

FIG. 17 is a perspective view of the valve body taken from the second end of the valve body.

FIG. 18 is a side view of the second end of the valve body.

FIG. 19 is a sectional view of the valve body taken along the lines 19-19.

FIG. 20 is a perspective view of the valve ball shown in the valve of FIG. 1.

FIG. 21 is an end view of the valve ball shown in FIG. 16.

FIG. 22 is a sectional view of the valve ball in FIGS. 20 and 21, taken along the lines 21-21.

FIG. 23 is a perspective view of the trunnion support element shown in the valve of FIG. 1;

FIG. 24 is an end view of the trunnion support element shown in FIG. 23.

FIG. 25 is a sectional view of the trunnion support element shown in FIGS. 23 and 24, taken along the lines 25-25.

FIG. 26 is a perspective view of the seat shown in the valve of FIG. 1.

FIG. 27 is an end view of the seat shown in FIG. 26.

FIG. 28 is a sectional view of the seat shown in FIGS. 26 and 27, taken along the lines 28-28.

FIG. 29 is a perspective view of the bonnet shown in the valve of FIG. 1.

FIG. 30 is an end view of the bonnet shown in FIG. 29.

FIG. 31 is a sectional view of the bonnet shown in FIGS. 29 and 30, taken along the lines 31-31.

FIG. 32 is a perspective view of the stem shown in the valve of FIG. 1.

FIG. 33 is a side view of the stem shown in FIG. 32.

FIG. 34 is a sectional view of the stem shown in FIGS. 32 and 33, taken along the lines 34-34.

DETAILED DESCRIPTION

Detailed descriptions of one or more preferred embodiments are provided herein. It is to be understood, however, that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in any appropriate system, structure or manner.

Overview of Compact Valve with Two Piece Retainer

FIG. 1 is a sectional side view of one embodiment showing an assembled compact valve body 20 with a two piece retainer 1100 (first 1200 and second 1300 sections) installed in the valve body 20 retaining a valve ball 200 and seats 1000,1000′ in the valve body 20. FIG. 2 is an end view of compact valve 10, showing certain valve components in an exploded condition—this end view being taken from the second end 40 of body 20. FIG. 3 is a sectional side view of the compact valve 10 taken along the lines 3-3 generally showing all valve components in an exploded condition.

FIG. 10 is a partially exploded perspective view of compact valve 10 showing valve body 20 with the two piece retainer 1100 (first 1200 and second 1300 sections) positioned to be installed in the valve body 20 where the valve ball 200 and seats 1000,1000′ are already installed in the valve body 20. FIG. 11 is a sectional view through the partially exploded view of the compact valve 10 taken along with lines 11-11.

In one embodiment compact valve 10 can comprise body 20, valve ball 200, and two piece retainer 1100. Valve ball 200 can be rotatably and sealably connected to body 20. Valve body 20 can include flow passage 60. Valve ball 200 can include flow passage 270. To allow flow through flow passage 60 of valve body 20, flow passage 270 can be aligned, either partially or wholly, with flow passage 60. To restrict or prevent flow through flow passage 60, flow passage 270 can be non-aligned, either partially or wholly, with flow passage 60. Alignment of flow passage 270 can be made by rotating valve ball 200 relative to valve body 20.

Valve ball 200 can be rotatably supported in body 20 by trunnions 220 and 260. Trunnion 220 can be rotatably connected to trunnion support element 400. Trunnion 260 can be rotatably connected to trunnion support element 450. Valve ball 200 can be operatively connected to stem 500, such as through stem recess 220. Stem recess 230 can have a rectangular cross section, although other types of operably connections can be made such as square, ribbed, or any non-circular shaped recess; or any type of mechanical connection.

In one embodiment rotating stem 500, such as in the direction of arrow 1500, causes similar rotation of valve ball 200. Stem 500 itself can be rotatably connected to body 20. Trunnion support element 400 can be supported in body 20. Accordingly, although valve ball 200 can rotate relative to valve body, longitudinal movement (i.e., arrows 1510,1520) can be restricted and/or prevented depending on the relative amount of longitudinal movement allowable between: valve ball 200 and trunnion support elements 400,450; and trunnion support elements 400,450 and valve body 20. It is preferred that longitudinal movement between valve ball 200 and valve body 20 be minimized. It is also preferred that stem 500 be aligned with cylindrical opening 420 of trunnion support element 400 (and cylindrical opening 470 of second trunnion support element 450) as misalignment can cause difficulty in turning valve ball 200.

Valve ball 200 can be sealably connected to valve body 20 by means of opposed and biased seats 1000 and 1000′. Seats 1000 and 1000′ can be supported in valve body 20 and biased toward valve ball 200, respectively in the directions of arrows 1510 and 1520. Accordingly, where flow passage 270 of valve ball 200 is rotated 90 degrees in relation to flow passage 60 of valve body 20 (e.g., in direction of arrow 1500), flow is cut off by the sealing effect of seats 1000 and 1000′. As the relative rotation between flow passage 270 of valve ball 200 and flow passage 60 of valve body 20 is reduced from 90 ninety degrees, the restriction of flow by valve ball 200 is reduced. Maximum flow through valve 10 is achieved when flow passage 270 of valve ball 200 is aligned with flow passage 60 of valve body 20 (i.e., when the relative rotation is zero degrees).

Generally two piece retainer 1100 can retain the valve components inside valve body 20. FIGS. 4 through 9 show various views of components of the two piece retainer 1100 which is generally comprised of rotationally static first section 1200 and rotating second section 1300.

FIG. 4 is a perspective view of first retainer section 1200. FIG. 5 is an end view of the first retainer section 1200. FIG. 6 is a sectional view of first retainer section 1200 taken along the lines 6-6. First section 1200 can include first and second shoulders 1250,1260 along with first and second circumferential areas 1252,1262 which accommodate seat 1000. Preferably, planar surface 1222 on second end limits the amount of longitudinal movement of first 400 and second 450 trunnion support elements which second retainer section 1300 is tightened in valve body 20. When retainer 1100 is installed in valve body 20, there exists a defined longitudinal length between planar surface 1222 of second retainer section 1200 and third shoulder 116 of valve body 20 so that trunnion support elements 400, 450 each have a limited defined space to sit in (i.e., the space between planar surface 1222 and third shoulder 116).

Preferably, a seal is maintained between first retainer section 1200 and valve body 20, which can be a lip seal. To facilitate this sealing, seal recess 1224 can be provided which can accommodates seals 1044, which seals can each include a lip seal and back-up ring (the back up ring increasing the sealing pressure rating and resisting extrusion of the lip seal). In one embodiment one or both of the back-up rings can be omitted.

Also preferably, a seal is maintained between first retainer section 1200 and valve seal 1000, which can be an o-ring type seal. To facilitate this sealing, seal recess 1040 can be provided which can accommodates seals 1042, which seals can each include an o-ring and back-up ring (the back up ring increasing the sealing pressure rating and resisting extrusion of the o-ring).

FIG. 7 is a perspective view the second retainer section 1300. FIG. 8 is an end view of second retainer section 1300. FIG. 9 is a sectional view of second retainer section 1300 taken along the lines 9-9. Second retainer section can be a threaded ring like section having first end 1310 and second end 1320 with a central opening 1305. A threaded area 1340 can be used to threadably connect second section 1300 to valve body 20. A plurality of spaced apart openings 1314 can be used to connect section retainer section 1300 to a tool for tightening or loosening of second retainer section relative to valve body 20.

Assembly and Disassembly of Valve with Two Piece Retainer

FIG. 1 is a sectional side view of the assembled compact valve 10 using two piece retainer 1100 to hold in place various internal valve components. FIG. 2 is an end view of the compact valve 10, but all valve components shown in an exploded condition from the second end 40 of valve body 20 of compact valve 10. FIG. 3 is a sectional view of exploded compact valve 10 taken along the lines 3-3.

FIGS. 10 through 15 schematically indicate the assembly steps of placement of the retainer 1100's first 1200 and second 1300 retainer sections into valve body 20. FIG. 10 is a partially exploded perspective view of one embodiment of valve 10 showing compact valve body 20 with the two piece retainer 1100 positioned to be installed in valve body 20 where the valve ball 200, trunnion support elements 400, 450, and seats 1000,1000′ are already installed in the valve body 20. FIG. 11 is a sectional view of the partially exploded view of valve 10 taken along with lines 11-11.

FIG. 12 shows both the first 1200 and second 1300 retainer sections before placement in valve body 20 of compact valve 10. Arrow 1400 schematically indicates the longitudinal movement which will occur in retain 1100 for pieces 1200,1300, although second retainer section 1300 which include rotational movement.

First section can include detachable seal 1226 which sits in recess 1224. Detachable seal 1226 can be a lip type seal. In one embodiment seal 1226 can include an extrusion ring to prevent extrusion of seal 1226. In one embodiment seal 1226 can be an o-ring type seal.

Seat retainer 1000 section can include detachable seal 1042 which sits in recess 1040. Detachable seal 1042 can be various conventionally available seals. In one embodiment seal 1042 can include an extrusion ring to prevent extrusion of seal 1042. In one embodiment seal 1042 can be an o-ring type seal.

FIG. 13 shows valve 10 where first retainer section 1200 has been partially inserted into valve body 20, but second retainer section 1300 has not yet been inserted into valve body 20. At this point seal 1226 has not yet made contact with valve body 20. Seal 1224 is shown in the vicinity of threads 140. Also at this point seal 1042 of seat 1000 has not yet made contact with first retainer section 1200. Second retainer section 1300 is shown on the outside of valve body 20. Arrow 1410 schematically indicates that second retainer section 1300 will be rotated relative to valve body 20, however, during such rotation in the direction of arrow 1410 first retainer section will remain rotationally fixed relative to valve body 20 (and also relative to valve seat 1000). Arrow 1400 schematically indicates longitudinal movement of first retainer section 1200 relative to valve body 20 while simultaneously remaining rotationally static relative to valve body 20. In FIG. 13 is also shown retaining pins 1246,1246′ in openings 1247 of first retainer 1200. Retainer pin 1246 will seat in opening 180 for restricting rotational movement of first retainer section 1200 relative to valve body 20. Retaining pin 1246′ will seat in opening 182 for restricting rotational movement of first retainer section 1200 relative to valve body 20 (rotational movement schematically indicated by arrow 1410). However, both retaining pins 1246,1246′ allow linear movement of first retainer section 1200 relative to valve body 20 (schematically indicated by arrow 1400).

FIG. 14 shows valve 10 where both first 1200 and second 1300 retainer sections have been partially inserted into valve body 20. Threads 1340 of second retainer section 1300 have now engaged threads 140 of valve body. Seal 1226 has engaged surface 132 of valve body 20. Seal 1042 has engaged surface 1262 of first retainer section 1200. Both retaining pins 1246,1246′ allow linear movement of first retainer section 1200 relative to valve body 20 (schematically indicated by arrow 1400). Rotational movement (schematically indicated by arrow 1410) of second retainer section 1300, with its threads 1340 engaging threads 140 of valve body 20, will cause second retainer section 1300 to move in the direction of arrow 1400 and push first retainer section 1200 in the direction of arrow 1400.

FIG. 15 shows valve 10 where both first 1200 and second 1300 retainer sections have been completely inserted into valve body 20. Continued rotational movement of second retainer section 1300 compared to FIG. 14 (schematically indicated by arrow 1410), with second retainer 1300 threads 1340 engaging threads 140 of valve body 20, will cause second retainer section 1300 to continue to also move linearly in the direction of arrow 1400 and continue to push first retainer section 1200 linearly in the direction of arrow 1400. During the linear pushing by second retainer section 1300, first retainer section 1200 moves only linearly (schematically indicated by arrow 1400) and is rotationally constrained by pins 1246 and 1246′. In this manner the seals 1226 and 1042 only see relative linear movement and no relative rotational movement. Eventually, second retainer section 1300 will push first retainer section 1200 enough in the direction of arrow 1400 that second end 1220 will contact both first 400 and second 450 trunnion supports locking linearly in place these trunnion support elements with shoulder 116 of valve body 20.

Disassembly of valve 20 can be performed by rotating second retainer section 1300 in a direction opposite of the rotational direction of arrow 1410. During disassembly, second retainer section 1200 also is constrained from rotational movement by pins 1246 and 1246′.

Valve Components

Below various individual components of valve 10 will be reviewed.

FIG. 16 is a perspective view of valve body 20 taken from the first end 30. FIG. 17 is a perspective view of valve body 20 taken from second end 40. FIG. 18 is a side view of valve body 20 taken from the second end 40. FIG. 19 is a sectional view of valve body 20 taken along the lines 19-19. Valve body can include first end 30 and second end 40. Flow passage 60 can proceed from first end 30 through second end 40. Stem 500 can be rotatably connected to valve body 20. Valve body 20 can include internal chamber 50 where valve ball 200 remains during use. From first end 30 to second end 40, valve body 20 can include threaded area 140, second cylindrical area 135, second shoulder 134, first cylindrical area 132, first shoulder 130, internal bore 50, shoulder 116, cylindrical area 112, shoulder 110, cylindrical area 102, cylindrical bore 102. First and second shoulders 100,110 are found in seat recess 120. Bonnet recess 80 can be provided for allowing attachment of bonnet 800 to valve body 20. One or more threaded bores 88 can be provided for fasteners 832. Openings 834,834′ can be used for inserting a stop pin 836. Lubrication port 160 and vent/bleeding port 162 can be respectively provided for lubrication fitting 161 and vent/bleeding fitting 163.

FIGS. 29 through 34 show the components of the valve bonnet 800 and stem 700 assembly.

FIG. 32 is a perspective view of stem 500. FIG. 33 is a side view of stem 500. FIG. 34 is a sectional view of stem 500 taken along the lines 34-34. Stem 500 can comprise shaft 510, and ball drive element 520. Ball drive element 520 can include substantially planar drive surface 530. Circumferential bearing surface 550 can be included for rotatably connecting stem 500 with valve body 20 through stem receptacle 70. Shaft 510 can include recess 580 for a key 582 which key can be used to operatively connect stem 500 to an actuator.

FIG. 29 is a perspective view of bonnet 800. FIG. 30 is an end view of bonnet 800. FIG. 31 is a sectional view of bonnet 800 taken along the lines 31-31. Bonnet 800 can be used to prevent stem 500 from blowing out of valve body 20. Bonnet 800 can be connected to valve body 20 through one or more fasteners 832. Bonnet 800 can include tip 870. Preferably, a seal is maintained between bonnet 800 and valve body 20. To facilitate this seal, recess 860 can be provided which can include seal 862 such as an o-ring and back-up ring (the back up ring increasing the sealing pressure rating and resisting extrusion of the o-ring).

FIG. 20 is a perspective view of valve ball 200. FIG. 21 is an end view of valve ball 200. FIG. 22 is a sectional view of valve ball 200 taken along the lines 21-21. Valve ball 200 can be spherically shaped and include top 210, bottom 250, and flow passage 270. Upper spherical surface segment can be located by top 210 and lower spherical surface segment 310 can be located by bottom 250. Stem recess 230 can be included.

Trunnion 220 can be located on top 210 and can include cylindrical area 222. Cylindrical area 222 can be rotatably or pivotally connected to trunnion support element 400. Bearing surface 224 can be substantially planar and slidingly contact first surface 402 of trunnion support element 400. Preferably, a trunnion shim 404 is provided to act as a bearing surface between bearing area 224 of valve ball 200 and trunnion support element 400. Also preferably, trunnion bearing 425 is provided between trunnion 220 and trunnion support element 400. Also preferably, trunnion 220 is prevented from contacting valve body 20 to prevent wear.

Trunnion 260 can be located on bottom 250 and can include cylindrical area 262. Cylindrical area 262 can be rotatably or pivotally connected to trunnion support element 450. Bearing surface 264 can be substantially planar and slidingly contact first surface 452 of trunnion support element 450. Preferably, a trunnion shim 454 is provided to act as a bearing surface between bearing area 264 of valve ball 200 and trunnion support element 450. Also preferably, trunnion bearing 475 is provided between trunnion 260 and trunnion support element 450. Also preferably, trunnion 260 is prevented from contacting valve body 20 to prevent wear.

Upper and lower spherical segments 300,310 can each be sealably connected to both seats 1000,1000′.

FIG. 23 is a perspective view of trunnion support element 400 shown in the valve of FIG. 1. FIG. 24 is an end view of trunnion support element 400. FIG. 25 is a sectional view of trunnion support element 400, taken along the lines 25-25. Trunnion support element 450 can be substantially similar to trunnion support element 400 and will not be described separately. Cylindrical opening 420 can be provided to slidably connect upper trunnion 220 of valve ball 200. First and third sides 416,418 of trunnion support element 400 can be held in place between third shoulder 116 of valve body 20 and second end 1220 of first retainer section 1200 (limiting movement of trunnion support element 400 in the direction of arrows 1510,1520).

FIG. 26 is a perspective view of 1000. FIG. 27 is an end view of seat 1000. FIG. 28 is a sectional view of seat 1000 taken along the lines 28-28. Seat 1000′ can be constructed substantially similar to seat 1000 (and seat 1000′ will not be individually described). Seat 1000 can include internal passage 1010, first side 1020, second side 1030, along with first and second circumferential areas 1070,1080. First and second circumferential areas 1070, 1080 of seat 1000 sit respectively in first and second circumferential areas 1252,1262 of retainer 1200. (For seat 1000′, first and second circumferential areas 1070,1080 sit respectively in cylindrical areas 112,102 of valve body 20).

Preferably, a seal is maintained between seat 1000 and valve body 20 (or second retainer section 1200). To facilitate this seal, recess 1040 can be provided which can include seal 1042, which seal can each include an o-ring and back-up ring (the back up ring increasing the sealing pressure rating and resisting extrusion of the o-ring). Preferably, a seal is maintained between seat 1000 and valve ball 200. To facilitate this seal, recess 1050 can be provided which can include seal 1052, which seal 1052 seals with upper and lower spherical surfaces 300,310 of valve ball 200 (seat 1000′ is substantially the same). Seal 1052 can be installed in recess 1050 using any conventional means, such as crimping, adhesive, friction fit, or other means.

To facilitate sealing at lower line pressures between seats 1000,1000′ and valve ball 200, biasing members 1090,1090′ can be provided which respectively push seat 1000 in the direction of arrow 1520 and seat 1000′ in the direction of arrow 1510 (both seats toward valve ball 200). At higher line pressures seats 1000,1000′ will tend to be pushed toward valve ball 200 because the larger exposed surface area on first side 1020 as opposed to second side 1030. This is because line fluid will not be able to pass seal 1052 thereby limiting the amount of surface area to which the line fluid can assert pressure. In an alternative embodiment a second set of biasing members can be provided for second circumferential area 1080 (or area 1080′ for seat 1000′). In one embodiment, peripheral groove 1082 can be provided to reduce the amount of surface area of seat 1000 which contacts valve body 20 (or retainer 1200 for seat 1000′) thereby reducing frictional forces between these items.

In any of the embodiments a lip seal can be used as the sealing element. In any of the embodiments an extrusion ring can be used in combination with the lip seal.

The following is a list of reference numerals:

LIST FOR REFERENCE NUMERALS (Reference No.) (Description) 10 compact manifold ball valve 20 body 30 first end 38 bores for fasteners 40 second end 42 raised area 44 peripheral groove for seal 46 seal 48 bores for fasteners 50 internal chamber 60 flow passage 70 stem receptacle 72 bore 80 bonnet recess 88 bores for fasteners 90 seat recess 100 first shoulder 102 cylindrical area 110 second shoulder 112 cylindrical area 116 third shoulder 118 cylindrical area 120 seat recess 130 first shoulder 132 cylindrical area 134 second shoulder 135 cylindrical area 138 third shoulder 139 cylindrical area 140 threaded area 150 internal bore 152 cylindrical area 160 lubrication port 161 lubrication fitting 162 vent/bleeding port 163 vent/bleeding fitting 180 opening 182 opening 200 valve ball 210 top 220 trunnion 222 cylindrical area 224 bearing area 230 recess for stem 250 bottom 260 trunnion 262 cylindrical area 264 bearing area 270 flow passage 280 first end 290 second end 300 spherical surface segment 310 spherical surface segment 400 first trunnion support element 402 first surface 404 trunnion bearing 405 trunnion shim/bearing 410 second surface 416 first side 417 second side 418 third side 419 fourth side 420 cylindrical opening 425 trunnion bearing 430 recessed area 450 second trunnion support element 452 first surface 454 trunnion bearing 455 trunnion shim/bearing 460 second surface 466 first side 467 second side 468 third side 469 fourth side 470 cylindrical opening 475 trunnion bearing 480 recessed area 500 stem 510 shaft 520 ball drive element 530 substantially planar drive surface 540 tip 550 bearing surface 552 bearing 570 top 580 recess for key 582 key 800 bonnet 810 first end 820 second end 830 plurality of recessed bores 832 plurality of fasteners 833 plurality of caps 834 opening for stop pin 836 stop pin 840 opening 850 recess 852 seal 860 recess 862 seal 870 tip 880 flat area 890 bore for stop pin 892 stop pin 894 grease bore 896 lubrication fitting 1000 seat 1010 internal passage 1020 first side 1022 planar surface 1030 second side 1032 shoulder 1040 recess 1042 seal and extrusion ring 1044 seal and extrusion ring 1052 seal or face seal 1090 circular wave spring 1100 two piece retainer 1200 first piece of retainer 1210 first end 1212 planar surface 1214 first recessed area 1220 second end 1222 planar surface 1224 seal recess 1226 seal 1230 internal passage 1242 first end 1244 second end 1246 plurality of shearable retainers to restrict rotation 1247 plurality of openings 1248 peripheral edge 1250 first shoulder 1252 first circumferential area 1260 second shoulder 1262 second circumferential area 1270 third shoulder 1272 third circumferential area 1300 second piece of retainer 1305 opening 1310 first end 1314 plurality of openings 1320 second end 1330 internal passage 1340 threaded area 1400 arrow 1410 arrow 1500 arrow 1510 arrow 1520 arrow

All measurements disclosed herein are at standard temperature and pressure, at sea level on Earth, unless indicated otherwise. All materials used or intended to be used in a human being are biocompatible, unless indicated otherwise.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above. Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention set forth in the appended claims. The foregoing embodiments are presented by way of example only; the scope of the present invention is to be limited only by the following claims. 

1. A compact manifold ball valve, comprising: (a) a valve body, the valve body having first and second longitudinal ends, a valve passage extending from the first to the second end; (b) a valve stem, the valve stem being rotatably connected to the valve body; (c) a valve ball, the valve ball being located in the valve passage, the valve ball having an upper end, lower end, and flow passage, and a pair of spaced apart trunnions; (d) a pair of spaced apart trunnion support plates, the trunnion support plates being located in the valve chamber and rotatably connected to the pair of valve trunnions; (e) a two piece retainer, the retainer being detachably connected to the valve body and limiting the amount of longitudinal movement by at least one of the trunnion support plates; (f) the two piece retainer section having first and second sections, the first section being installed in the valve passage with a generally longitudinal movement and no rotational movement, the second section being a ring member with threaded periphery and being rotated to thread it into the interior passage of the valve body which second retainer section pushes on the first retainer passage.
 2. The compact manifold ball valve of claim 1, wherein each trunnion support plate includes a circular trunnion bearing rotatably connected to one of the trunnions of the valve ball.
 3. The compact manifold ball valve of claim 1, further including first and second valve seats, wherein each valve seat is operatively connected to a biasing member tending to cause the respective valve seat to maintain contact the valve ball.
 4. The compact manifold ball valve of claim 3, wherein the two piece retainer longitudinally holds in place at least one of the trunnion support plates restricting the amount of longitudinal movement of said trunnion support plate.
 5. The compact manifold ball valve of claim 4, wherein the two piece retainer longitudinally holds in place both trunnion support plate such that no longitudinal movement allowed.
 6. The compact manifold ball valve of claim 4, wherein the first retainer section includes a sealing portion having little to no relative rotational movement between sealing elements for the first valve seat during relative movement between the first retainer section and valve seat during valve assembly.
 7. The compact manifold ball valve of claim 6, wherein the second retainer section is both threadably connected to the valve body and concentrically positioned in said body.
 8. The compact manifold ball valve of claim 4, wherein the first retainer section includes a sealing portion having little to no relative rotational movement between sealing elements for the first valve seat during relative movement between the first retainer section and valve seat during valve assembly, and little to no relative rotational movement between sealing elements for the valve body and two piece retainer during relative movement between the first retainer section and valve body during valve assembly.
 9. The compact manifold ball valve of claim 1, wherein the second section of the two piece retainer is both threadably connected to the valve body and concentrically positioned in said body, wherein rotation of the first section relative to the valve body causes either tightening or loosening of the first section relative to the valve body.
 10. The compact manifold ball valve of claim 9, wherein the second section is a ring, and rotational movement of the second section causes linear movement of the second section relative to the valve body.
 11. The compact manifold ball valve of claim 10, wherein rotational movement of the first section of the two piece retainer relative to the valve body is constrained
 12. The compact manifold ball valve of claim 11, wherein at least one locking pin rotationally locks the first section relative to the valve body while allowing linear movement of the first section relative to the valve body.
 13. The compact manifold ball valve of claim 11, wherein rotational movement of the first section relative to the valve body is constrained and/or prevented while relative linear movement is allowed.
 14. The compact manifold ball valve of claim 11, wherein the first section includes a detachable sealing element along with at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of both the first section and sealing element relative to the valve body.
 15. The compact manifold ball valve of claim 1, wherein the first section includes a first detachable sealing element which fluidly seals the first section to the valve body, and the first valve seat includes a second detachable sealing element which fluidly seals the first valve seat to the first section.
 16. The compact manifold ball valve of claim 15, wherein the first section also includes at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of the first section and the first sealing element relative to the valve body, along with relative movement between the first valve seat and second sealing element attached to the valve seat with respect to the first section.
 17. The compact manifold ball valve of claim 15, wherein the first sealing element forms a seal between the first section and valve body, while the second sealing element forms a seal between the first section and first valve seat.
 18. The compact manifold ball valve of claim 15, wherein the first section includes first and second detachable and spaced apart sealing elements, along with at least one locking pin that rotationally locks the first section relative to the valve body while simultaneously allowing linear movement of the first section and the attached first and second sealing elements relative to the valve body.
 19. The compact manifold ball valve of claim 18, wherein the first sealing element forms a seal between the first section and valve body, while the second sealing element forms a seal between the first section and valve seat.
 20. The compact manifold ball valve of claim 16, wherein the locking pins have a relatively small predefined sheering force where a rotational force exceeding the predefined sheering force will cause both locking pines to sheer and allow relative rotational movement between the first section and valve body.
 21. The compact manifold ball valve of claim 20, wherein the locking pins are symmetrically spaced about the first retainer section. 